Data storage control apparatus, data storage apparatus, data readout control apparatus, data storage method, compression circuit, and compression method

摘要

A data storage control apparatus includes a compression part that performs lossless compression for reducing a data amount on image data that is in units of blocks, a determination element for determining whether lossless compression is possible or not, and a storage control part that performs storage control for, if the determination element has determined that lossless compression is possible, causing data obtained through lossless compression to be stored as compressed data in a storage part, and if the determination element has determined that lossless compression is not possible, causing the image data in units of blocks to be stored in the storage part.

主权项

1. A data storage control apparatus comprising:
circuitry configured to: perform lossless compression for reducing a data amount on image data that is in units of blocks by determining a reference pixel from among pixels constituting a block and calculating a difference in a pixel value between adjacent pixels for each normal pixel other than said reference pixel; determine whether said lossless compression of the block is possible or not by determining whether or not the difference in the pixel value for every said normal pixels in the block is representable in a smaller number of bits than a number of bits used to represent said reference pixel; perform storage control for, in a case where the circuitry determine that lossless compression is possible, causing data obtained through said lossless compression to be stored as compressed data in a storage part, and in a case where the circuitry determine that lossless compression is not possible, causing said image data in units of blocks to be stored in said storage part.